Stock investing refers to the process of buying and holding shares or stocks in a publicly traded company with the goal of earning money through capital appreciation, dividend income, or both. Investors buy stocks hoping that their value will increase over time, allowing them to sell at a higher price than they paid for it, thus making a profit. Additionally, many companies pay out dividends to shareholders on a regular basis as a way of sharing the company's profits with its investors. Stock investing can be done through various methods such as long-term holding, short selling or day trading, and requires knowledge about the market trends, financial statements analysis, and risk management strategies to make informed decisions.